<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
</head>
<body>

    <div id="app">
        <select v-model="selected" multiple>
            <option v-bind:value="{ number: 100 }">A</option>
            <option v-bind:value="{ number: 200}">B</option>
            <option v-bind:value="{ number: 300}">C</option>
            <option v-bind:value="{ number: 4000}">C</option>
        </select>
        <p><span>{{ selected }}</span></p>
    </div>

<!--引入vue文件-->
<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
<script>
    const vm = Vue.createApp({
        data(){
            return {
                selected: []
            }
        }
    }).mount('#app');
</script>

</body>
</html>
